Author Topic: 47000$ Headphone amp with no resistors or capacitors  (Read 7324 times)

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Offline iampoor

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Offline TheBorg

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #1 on: April 11, 2014, 04:14:42 am »
Don't worry, you can buy the schematic for only $47!!!
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Online pickle9000

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #2 on: April 11, 2014, 04:20:38 am »
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=231198367845&ssPageName=ADME:X:AAQ:US:1123


 :-DD

Could this even work?Class A with no bias resistor?  >:D


It does not come with a resistor, you need lick two fingers a place them in the appropriate locations.
 

Online T3sl4co1l

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #3 on: April 11, 2014, 04:25:18 am »
S. Bench did a few:

http://www.jacmusic.com/techcorner/SBENCH-PAGES/sbench101/#PowerAmps

Nothing wrong with it, just a matter of arranging it so the bias range is okay.  Also takes a shitload of transformers to do right :o

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Online pickle9000

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #4 on: April 11, 2014, 04:46:37 am »
To be honest I haven't touched a tube in over 40 years. It is interesting.

I still think the finger touching would be funny / potentially deadly of course.

That price is amazing.
 

Offline GreyWoolfe

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #5 on: April 11, 2014, 02:36:44 pm »
Forget the amazing price, there are actually 2 watchers |O!!!!!!!!!!!  For that price, it should come with a couple of the ladies of the evening to clean your tubes for a year! :-DD
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Offline linux-works

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #6 on: April 11, 2014, 02:51:56 pm »
inside those tubes are hidden lm741's and silver band carbon resistors.

lol
 

Offline kolbep

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #7 on: April 11, 2014, 03:07:22 pm »
Maybe it is a Unity gain amplifier. The Battery connection is just to make the filaments glow, giving that warm feeling. but then the In and Outs are probably just tied together.

But for the price, maybe they cut open the tubes, and put an Opamp in each of them, and an orange LED for the same effect.  :-DD
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Offline wraper

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #8 on: April 11, 2014, 03:52:00 pm »
Maybe it is a Unity gain amplifier. The Battery connection is just to make the filaments glow, giving that warm feeling. but then the In and Outs are probably just tied together.
Seems to be. Two filaments in series connected to the 12 V battery as there are no other power connections. He also wrote that it works only with high resistance headphones, no wonder why. I think this guy is trolling audiophools.
 

Offline linux-works

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #9 on: April 11, 2014, 03:55:42 pm »
if the phones are high-z, then they will need a higher voltage across them to make the same volume.  I have high-z phones (sennheiser) and I need a good dual 15 or even dual 24 (one of my amps is dual 30) to get enough volts across them to drive them properly.

mostly, you don't need voltage gain for phones, though; you need current gain (drive).  but still, 12v (if that's all he has) is a bit absurd if you are talking about high-z phones.
 

Offline wraper

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #10 on: April 11, 2014, 04:58:17 pm »
Wrote him a message:
Are you trolling audiophools? Seems that input and output is directly connected  and battery is for glowing filaments :).

Reply:
Hello,
Forget what you think and please read feedback on eBay's profile.
You are right. It sounds like a wire connected from input to output but with power gain. But when fillaments start to fade away, music fades too. And when you switch on and they begin to glow, music happens, and there's magic in music, and you feel beauty...
Best regards,
Aetoulis
 

Offline linux-works

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #11 on: April 11, 2014, 05:07:21 pm »
you 'feel beauty'?

for $47k, I would hope this includes a free 'happy ending'.  yeah, feelin' some beauty there, lol!
 

Offline miguelvp

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #12 on: April 11, 2014, 05:40:13 pm »
Well, when I saw the comments on the auction he says that the prices is and is not a typo and that he will sell the schematic for $49.

So it seems the auction is the hook, making the user check the profile (the line) and the schematic is the sinker
 

Offline eliocor

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #13 on: April 11, 2014, 06:31:02 pm »
Just a question (I do not know how to check it)...
Was the auction started on the first of April?
« Last Edit: April 11, 2014, 07:18:30 pm by eliocor »
 

Offline Aldobrandi

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #14 on: April 11, 2014, 06:35:07 pm »
Oh wait, I think I recognize this guy, it is one of these class B.S. amplifier. They supposedly have high chromatic rendition achieved by sub-quantum charging of the "inventor's" dead brain. The only problem with them (which can actually be a bonus for some) is that they make your entire house smell like bacon  ^-^
 

Offline linux-works

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #15 on: April 11, 2014, 06:37:13 pm »
aha!  its BDA based (bacon-defined amplification).

I can smell the swine-waves all the way from here!

hahaha ;)

 

Offline Aldobrandi

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #16 on: April 11, 2014, 06:38:53 pm »
]
I can smell the swine-waves all the way from here!


 :-DD
 

Offline The Electrician

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #17 on: April 11, 2014, 07:02:46 pm »
Holy crap!!!

Look at his "other items" on eBay!!
 

Offline wraper

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Offline GreyWoolfe

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #19 on: April 11, 2014, 10:16:18 pm »
Oh wait, I think I recognize this guy, it is one of these class B.S. amplifier. They supposedly have high chromatic rendition achieved by sub-quantum charging of the "inventor's" dead brain. The only problem with them (which can actually be a bonus for some) is that they make your entire house smell like bacon  ^-^

Mmmmmmmmmmmmmmmmmmm, greasy pork products!
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Offline tom66

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #20 on: April 11, 2014, 10:45:16 pm »
I don't understand the point of this. Virtually any source is going to be full of icky resistors, capacitors and "gasp" transistors... so how the hell does two tubes matter? Even to the stupid audiophile do they think their iPod or CD player exclusively uses tubes only??
 

Offline N2IXK

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #21 on: April 11, 2014, 10:52:59 pm »
Even to the stupid audiophile do they think their iPod or CD player exclusively uses tubes only??

You mean they don't?  Guess they save the tubes for more important jobs, like running supercomputers....

http://www.ominous-valve.com/vtsc.html

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Offline iampoor

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Re: 47000$ Headphone amp with no resistors or capacitors
« Reply #22 on: April 12, 2014, 12:05:46 am »
I don't understand the point of this. Virtually any source is going to be full of icky resistors, capacitors and "gasp" transistors... so how the hell does two tubes matter? Even to the stupid audiophile do they think their iPod or CD player exclusively uses tubes only??

Or the fact that the must was recorded through a signal path with hundreds of opamps.  :-DD
 


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